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Warning

UBL-CR-202: The buyer should not have a seller-assigned account ID

In short

Warning: worth checking.

UBL-CR-202 means the buyer's section of your UBL file contains an account ID assigned by the seller (SupplierAssignedAccountID), which EN 16931 does not use. This is a warning. Remove cbc:SupplierAssignedAccountID from cac:AccountingCustomerParty. If the number identifies the buyer, you can put it in the buyer identifier (BT-46) instead.

On this page

What it means

The rule warns if the buyer block (cac:AccountingCustomerParty) in a UBL invoice or credit note contains cbc:SupplierAssignedAccountID. In UBL this element holds the account or customer number that you, as the seller, have given the buyer. EN 16931 has no business term for this separate account field.

Why it matters

EN 16931 uses the buyer identifier (BT-46) for an identifier of the buyer, not cbc:SupplierAssignedAccountID. This warning concerns the presence of the separate account element.

How to fix it

Delete cbc:SupplierAssignedAccountID directly under cac:AccountingCustomerParty. If the number is an identifier you and the buyer use for the buyer, put it in the buyer identifier (BT-46), at cac:AccountingCustomerParty/cac:Party/cac:PartyIdentification/cbc:ID. If your invoicing software adds the excluded element, ask its supplier to correct the export. Export again and recheck the file.

Once the file is corrected, check it again for free: Validate an invoice against EN 16931

Or fix the invoice in a form and download the corrected file, for 1 credit: Fix a rejected e-invoice

The rule as published

A UBL invoice should not include the AccountingCustomerParty SupplierAssignedAccountID

Where this rule applies

Rule set Version
EN 16931 (UBL) 1.3.17
EN 16931 (UBL credit note) 1.3.17
XRechnung 3.0 (UBL) 3.0.2
XRechnung 3.0 (UBL credit note) 3.0.2
Peppol BIS Billing 3.0 (invoice) 2026.5
Peppol BIS Billing 3.0 (credit note) 2026.5
SI-UBL 2.0 / NLCIUS (invoice) 2.0.3.13
SI-UBL 2.0 / NLCIUS (credit note) 2.0.3.13
France CTC (UBL invoice) 1.4.0-04
France CTC (UBL credit note) 1.4.0-04
CIUS-RO UBL Invoice 1.0.9 1.0.9
CIUS-RO UBL Credit Note 1.0.9 1.0.9
Rule text from phive-rules 4.6.4.

Check your file

Drop your e-invoice to see whether UBL-CR-202 still fails, and which other rules do.

Updated 6 November 2026